docs: def create(gandi, datacenter, bandwidth, ip_version, vlan, ip, attach,
             background):
      """Create a public or private ip
      """
      if ip_version != 4 and vlan:
          gandi.echo('You must have an --ip-version to 4 when having a vlan.')
          return
  
      if ip and not vlan:
          gandi.echo('You must have a --vlan when giving an --ip.')
          return
  
      vm_ = gandi.iaas.info(attach) if attach else None
  
      if datacenter and vm_:
          dc_id = gandi.datacenter.usable_id(datacenter)
          if dc_id != vm_['datacenter_id']:
              gandi.echo('The datacenter you provided does not match the '
                         'datacenter of the vm you want to attach to.')
              return
  
      if not datacenter:
          datacenter = vm_['datacenter_id'] if vm_ else 'LU'
  
      try:
          gandi.datacenter.is_opened(datacenter, 'iaas')
      except DatacenterLimited as exc:
          gandi.echo('/!\ Datacenter %s will be closed on %s, '
                     'please consider using another datacenter.' %
                     (datacenter, exc.date))
  
      return gandi.ip.create(ip_version, datacenter, bandwidth, attach,
                             vlan, ip, background)